CONSECUTIVE NUCLEATION EVENTS DURING DIVETRIFICATION OF Zr52.5Cu17.9Ni14.6Al10Ti5 BULK METALLIC GLASS

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Advanced Engineering Materials

DOI:https://doi.org/10.1002/adem.200800129· OSTI ID:979108

Yang, Ling ^[1]; Wang, Xun-Li ^[1]; Porter, Wallace D ^[1]; Lu, Zhao Ping ^[1]; Stoica, Alexandru Dan ^[1]; Payzant, E Andrew ^[1]; Almer, Jon ^[2]; Shi, D. ^[3]

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1. ORNL
2. Argonne National Laboratory (ANL)
3. University of Cincinnati

Differential scanning calorimetry, x-ray, and in-situ synchrotron diffraction were used to study the divitrification of Zr52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glass. Two consecutive exothermal peaks were identified by differential scanning calorimetry during both isochronal and isothermal scans. Examination of the X-ray and in-situ synchrotron diffraction patterns at various stages of annealing confirms that the exothermal peaks correspond to two nucleation events, with different local atomic structures. Modeling of the calorimetry data indicates that the devitrification in this alloy is adequately described by Johnson CMehl CAvrami theory with a two-step consecutive reaction model.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Temperature Materials Lab. (HTML); Metals-Processing Laboratory Users Facility; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 979108
• Journal Information: Advanced Engineering Materials, Vol. 10, Issue 11; ISSN 1438-1656
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ALLOYS
ANNEALING
CALORIMETRY
DIFFRACTION
GLASS
NUCLEATION
SIMULATION
SYNCHROTRONS
bulk metallic glass
DSC
nucleation
devitrification